CVE-2026-64345 usb: gadget: f_printer: take kref only for successful open

[
  {
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    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/usb/gadget/function/f_printer.c"
    ],
    "versions": [
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    ]
  },
  {
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    "vendor": "Linux",
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    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/usb/gadget/function/f_printer.c"
    ],
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      }
    ]
  }
]